diff --git a/trace/spec/semantic_conventions.md b/trace/spec/semantic_conventions.md
index 61441ce..dcce93f 100644
--- a/trace/spec/semantic_conventions.md
+++ b/trace/spec/semantic_conventions.md
@@ -28,6 +28,9 @@ The following attributes are reserved and MUST be supported by all OpenInference
 | `message.function_call_name`           | String          | `"multiply"` or `"subtract"`                                               | Function call function name                                      |
 | `message.function_call_arguments_json` | JSON String     | `"{ 'x': 2 }"`                                                             | The arguments to the function call in JSON                       |
 | `message.content`                      | String          | `"What's the weather today?"`                                              | The content of a message in a chat                               |
+| `message.tool_calls`                   | List of objects | `[{"tool_call.function.name": "get_current_weather"}]`                     | List of tool calls (e.g. function calls) generated by the LLM    |
+| `tool_call.function.name`              | String          | `get_current_weather`                                                      | The name of the function being invoked by a tool call            |
+| `tool_call.function.arguments`         | JSON string     | `"{'city': 'London'}"`                                                     | The arguments for the function being invoked by a tool call      |
 | `llm.model_name`                       | String          | `"gpt-3.5-turbo"`                                                          | The name of the language model being utilized                    |
 | `llm.prompt_template.template`         | String          | `"Weather forecast for {city} on {date}"`                                  | Template used to generate prompts as Python f-strings            |
 | `llm.prompt_template.variables`        | List of strings | `["city", "date"]`                                                         | List of variables to be used in the prompt template              |
@@ -46,7 +49,7 @@ The following attributes are reserved and MUST be supported by all OpenInference
 | `reranker.input_documents`             | List of objects | `[{"document.id": "1", "document.score": 0.9, "document.content": "..."}]` | List of documents as input to the reranker                       |
 | `reranker.output_documents`            | List of objects | `[{"document.id": "1", "document.score": 0.9, "document.content": "..."}]` | List of documents outputted by the reranker                      |
 | `reranker.query`                       | String          | `"How to format timestamp?"`                                               | Query parameter of the reranker                                  |
-| `reranker.model_name`                       | String          | `"cross-encoder/ms-marco-MiniLM-L-12-v2"`                                  | Model name of the reranker                                       |
+| `reranker.model_name`                  | String          | `"cross-encoder/ms-marco-MiniLM-L-12-v2"`                                  | Model name of the reranker                                       |
 | `reranker.top_k`                       | Integer         | 3                                                                          | Top K parameter of the reranker                                  |
 
 Note: the `object` type refers to a set of key-value pairs also known as a `struct`, `mapping`, `dictionary`, etc. 
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